6324399440 has 40 divisors (see below), whose sum is σ = 14801635968. Its totient is φ = 2513001600.

The previous prime is 6324399397. The next prime is 6324399563. The reversal of 6324399440 is 449934236.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 6324399391 and 6324399400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249692 + ... + 273851.

Almost surely, 2^6324399440 is an apocalyptic number.

It is an amenable number.

6324399440 is an abundant number, since it is smaller than the sum of its proper divisors (8477236528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6324399440 is a wasteful number, since it uses less digits than its factorization.

6324399440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523707 (or 523701 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 44.

The square root of 6324399440 is about 79526.0928249339. The cubic root of 6324399440 is about 1849.2960009435.

The spelling of 6324399440 in words is "six billion, three hundred twenty-four million, three hundred ninety-nine thousand, four hundred forty".